Question:-
a. When was the Universe formed?
b.
What is universe made by?
What is galaxy?
e. Which is the biggest galaxy?
Answers
Answer:
Around 13.8 billion years ago, all the matter in the Universe emerged from a single, minute point, or singularity, in a violent burst. This expanded at an astonishingly high rate and temperature, doubling in size every 10-34 seconds, creating space as it rapidly inflated.
Universe is thought to consist of three types of substance: normal matter, 'dark matter' and 'dark energy'. Normal matter consists of the atoms that make up stars, planets, human beings and every other visible object in the Universe.
galaxy is a huge collection of gas, dust, and billions of stars and their solar systems, all held together by gravity. We live on a planet called Earth that is part of our solar system. ... A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems.
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☆Answers:-
1.) When was the Universe formed?
→ According to astronomers, the universe was formed after the Big-Bang explosion which took place 10-15 billion years ago. Space, time, energy and matter all came into existence. The matter released during the explosion led to the formation of galaxies which were great masses of stars. The sun is one of those stars in the galaxies that formed during the explosion.
2.) What is the Universe made up of?
→ The entire Universe is made up of atoms. After the great explosion called Big-Bang, the Universe cooled down to tiny particles known as protons, neutrons and electrons which joined together and formed atoms.
3.) What is a Galaxy?
→ A galaxy is a cluster of stars held together by the force of gravity. These are made up of gas, stars and dark matter. Astronomers have estimated that there are nearly 20 trillion galaxies.
4.) Which is the biggest galaxy?
→ According to scientists and astronomers, the biggest galaxy is Andromeda Galaxy which is located near Milky Way.